Studies of high temperature species by infra-red and Raman spectroscopy

Abstract

Several cells for studying gas-phase vibrational spectra at high temperatures are described. The Raman spectrum of gaseous tin dichloride is obtained in a cell which is potentially capable of extension to 1500°C. The Raman spectrum of niobium pentafluoride as a function of temperature has been obtained in a sapphire cell with a gold O-ring seal capable of being operated at temperatures in the region of 750°C. The infra-red spectrum in a thermal gradient cell which is usable to 1000°C is presented for aluminium tribromide. Applications of tunable lasers to high temperature infra-red spectroscopy are briefly discussed.